koosseau de lafarge



UNITED STATES PATENT OEEICE.

J. J. L. ROUSSEAU DE LAFARGE, OF PARIS, FRANCE.

APPARATUS FOH OBTAINING PHOTOGRAPHIC PICTURES.

Specification forming part of Letters Patent No. 43,270, dated Jnncl. ltll.

.To all whom, it may aaneen-q.-

Be it known that I, J EAN J AcQUEs LEOPOLD RoUssEAU DE LAFARGE, of Faris, in the Empire of France, have invented certain new and useful Improvements in Photographie Apparatus; and I do hereby declare that the following is a full, clear, and exact description of the saine, reference being had to the accompanying drawings.

This apparatus enables the manipulator to operate in full light upon damp collodi'on to sensitize the glass and to finish the proof in .the iight.

The apparatus does not alter the negative now used, but it serves as an auxiliary to it. In the apparatus the following characteristic elements are combined: The employment of two vertical and independent bath-vessels arranged to allow of the glasses being easily plunged therein. One vessel, containing the bath of silver for sensitizing the damp collodion, maybe of gutta-percha, hardened rubber, or other material having no action on the bath. The other, containing the iron bath for developing the picture, should bc of yellow or orange colored'class. It' made ot' any other material, it should be lined with yellow-colored glass. There is aframe for holding the glasses f to be exposed, capable of being opened and closed at bottom byA withdrawing or inserting a sliding bar. There is a second frame for holding the collodionized glass in the former l frame, which secoudframe is styled the plunging-framed? because it is used for introducing the glass into the bath-vessels, entering also with it. It is insulated from the rst frame, andniay be passed through it.

the baths.

A piece of;` catgnt is attached te the plunging-frame to raise and lower it into and out of The arrangement ofthe apparatus and the i'nelho'd of action will be iully understood en after mentioned, to receive the frame during the operation. To hold it the vessels are tted with two plates projecting a little over the g opening y y, Fig. 3. The groove in each vesl sel is closed on one side, l', Fig. l. On the i other it may be closed by a' hardened-rubber spring, Fig. '17. The opening of eachvessel l is closed by a stopper, j', Figs. l and 3, fitted with an india-rubber band. Pressure is exl erted and maintained by two screws, 'i t'. As before stated, the vessel for containing the g nitrate-ofsilver bath should be of water-proof material and should exert no action upon the j' bath. I prefer g'utta-percha or glass. -lt should also he inclosed by a wooden frame. The vessel for developing the picture should i be of y of any other material it should l yellow-colored glass. V Fig, 2l represents av square piece of cork fixed to a small rod, with two'lines thereon ,l for indicating the minimum and maximum quantity of liquid to be introduced into. each vessel. Fig. 3 is a side view of one of the vesj sels open. Fig. et representsthe frame which ,I exposes the glasses to the dark-chamber, and l forstereoscopic proofs. Icallit the principal or outer77 frame. Its lowerpartis opened and closed at will by means oi' a rod, X, of whalebone, wood, or hardened rubber, sliding. in a grooved guide. pp is another exterior-groove having a corresponding groove parallelland lat the same height on the other face.

be lined with Fig. 5 shows a second frame for holding the collodionized glass in the former frame, which g second frame, as before stated, is styled the plunging-frame. It is formed of bands of copper or brass of the same breadth and thickl ness, soldered together, as seen in the iigurei The bands a a are seen in side view, and the bands b b infront view. c shows the latter in iside View. Small clips V V are soldered at 'z a, and serve to hold the glass and insulate it from the bands b. A space is left for the. easy passage of the liquid. At the; corresponding upper part there are also fixed two small plates, y 1 1V as sceiiat f,or simply of the 1 shape represented at gk 'They also insulate ,l the glass, which thus rests only upon its four corners. The plungii1g:fraiie is itselfhept as much as possible from contact with the prinl cipal frame by four other soldered pieces or ellow-or orange colored glass. It' madeshoes, r i r a little bent, as shown at s. A small button, f, moving round a pin, assists in holding the glass. The whole should be silver-ed. The plungingframe is moved from the principal frame into the bathevessels, and vice versa, by means of a piece of catgut passing to the outside through a hole, m, formed in the upper part of the principal frame, Fig. 4. Fig. 24 shows a plunging-frame with a different arrangement of the shoes r r r r. Fig. 7 is another plunging-frame of hardened rubber. Fig. 6' shows the plungingframe moving in the principal-frame.

The spring which presses on the glass to keep it in position is represented in Fig. 20. a b shows a flap in sid-e view, in which a recess is forinedto receive two copper plates, i' 1', and two steel springs, s s. The two copper plates are fixed in the lap by two axes at the points t t. u, and at this point they are also connected button, V. Then pressureis exerted on this butt-on, the two plates move on their respective axes and enter the thickness of the'tlap. rIhe rod of the button is retained in this position by a spring-bolt, which seizes it. lf the the glass, simply draw the spring-bolt, and the two springs s s, being free, exert their pressure and push the button outward.

part should have a handle in the form of a T, entering at will. (See Fig. 14.)

The manilmlations are performed as follows: The principal frame inclosing the plungingnitrate of silver. 'The plates yy; Fig. 3, take into the grooves p p, Fig. 4, and the frame slides along the opening in the vessel. (This arrangement may be replaced by a dovetailgroove and correspondingdovetail projection, as represented in Figs. 8 and 23.)` The iiap of the frame is then opened, the glass eollodionized, and introduced into the plungingframe. rIhe iiap is then closed, care being taken that its spring re-enters the thickness thereof, the rod X' is drawn out, and the glass consequently t'alls into thevesscl. After it has been sufficiently sensitized it is raised into the principal fra-me by drawing the string. The opening of kthe principal frame is closed by returning the rod X to its place. The spring-bolt is then drawn and I expose to the dark-chamber. For the development of the image the frame is applied to the vessel containing protosulphate of iron, and the glass is submitted to the bath in the same manner` as to the nit-rate-of-silvei` bath, with this difference, that it is made to turn on hinges so as to show by transparency the development of the image. It is then only necessary to wash and fix.

If desired, other vessels may be fitted be- They are connected hiugewise at i l held by screws.

any modification. z sired, have small fillets litt-ed to them similar to those in Fig. 12, or two fillets in the form frame is fitted to the vessel containing the vbox ai, Fig. 1. Before commencing another prooi the traces of the iron bath are removed from the frame.

Fig. 9 shows the plunging-frame in the act of being lowered from the principal frame into a vessel, c, Fig. 15. In order that this may take place freely the internal breadth of the principal `frame should be narrower than the vessel and the lower opening of the principal frame should be widened and rounded at the edges.

The plunging frame maybe dispensed with by employing a yscrewed nipper of sitver, as represented in front and side views in Fig. 19. It takes hold of 'the glass at the upper part. A piece of india-rubber prevents the screw from rubbing against the glass. The methods represented in Figs. 1S and 22 may also be adopted. In these arrangements the glass moves in grooves formed by rabbets a b la b on the frame and two fillets fixed to the to a rod which communicates outside with a interior surface ofthe door.

(See Figs. 10 and 1l.)

The rabbets a b a b are on a level vwith the'rabbet c d the same at the lower part of the frame.` By the addition of fillets I can forni these rabbets, if desired, in the y frame of the preceding arrangement. copper plates are tobe allowed to pass onto Fig. 16 represents the internal grooves in i which thc glass works and the passage for the nipper or hooks. i the principal frame the rabbet-s a. b a 'b and It' the principal frame for stereoscopic proofs i has two iiaps underneath, that of the lower Atthe lower part of the two fillet-s should he rounded oft', as shown in Figs. 12 and 26. In Fig. 26 the llets are The vessels do not require They may, however, if deof triangular prisms, two sides of which are rounded where they meet the third side. The

opening of the vessel is modified, as showny at r, Fig. 25. In these last arrangements, before sensitizing the glass it is-necessary to remove with a piece vof paper about a sixth of an inch of collodion from the side edges.

Fig. 13 shows how this invention may be applied to all kinds of dark-chambers. Itis only necessary to lretain .the plate t, shown detached at g.

And, having now described the nature of the said invention, and in what manner the same is to be performed, I declare that I claim- 1. The internally-grooved box for carrying the glasses, in combination with compartithe damp collodion, the other made or lined with yellow glass to contain the iron bath for developing the picture.

3. Combining with each vessel a hinged stopper land screws to form a secure and heror released at pleasure, substantially in the meti joint, substantially as set forth. manner and for the purposes set forth.

4. The construction of the principal or In testimony whereof I have signed iny outer frame with pinnging-t'rnnie or nippel' nome t0 this speeitiontion' before two snbflnp prOYided with a. vrubber onrnbber-hned Withdrawn from oit the surface of the glass and doors provided with springs for keeping i seribing witnesses.

the glass in position. J. J. L. ROUSSEAU DE LAFARGE.

5. The arrangement of the springs in the YVitnesses: Hap and their combination with an outside! GEO. HUTTON,

lin-ob and trigger, so that the springs nay be UH. ARMENGARD. 

